Source
Open a document from a link
A link opens the document from its host. Upload a local copy if it will not display here.
Adjust the view
The source bytes stay unchanged. Current viewing settings are captured when you save a reading. Image adjustments do not apply inside a PDF viewer.
The original is your reference
Open an image or PDF.
The image stays on your device.
Compare an externally enhanced image
Keep the original above. Open an enhanced copy from your own tool below. Its file hash can be measured here; the processing method is your declaration. Do not treat newly apparent detail as confirmed source content.
No enhanced copy opened.
Matching pixel dimensions are required for the comparison slider. Matching dimensions alone do not prove alignment.
Keep the source file with your saved record. Document files are not embedded in the JSON export.